Automatic hole protection device for a perforating drill

Abstract

The utility model provides a kind of automatic hole protection device of perforating drilling machine, including base, connecting frame and three arc locking blocks, the top of base is fixedly connected with three connecting frames, the one end of each connecting frame is equipped with locking cylinder, base is circular, the inner ring of base is sequentially inserted with multiple snap rings of gradually reducing diameter, multiple detachable and increasing snap rings are provided, multiple detachable and increasing snap rings are provided, so that the device can be used on the drilling machine of different aperture, and it is more convenient to disassemble and assemble, and it does not affect work efficiency, and locking cylinder is provided, the cooperation of locking cylinder and T-shaped rod is used, so that arc locking block can be smoothly matched with the drilling machine of different aperture, and ball is provided, so as to effectively ensure rotation, avoid friction and cause damage to rotating shaft.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment, specifically to an automatic hole protection device for a drilling rig. Background Technology

[0002] In today's rapidly developing open-pit mines, with the increasing demands for intelligent mining and standardized quality, the "Safety Regulations for Blasting" (GB6722-2014) for deep-hole blasting in open-pit blasting explicitly requires in section 7.2.1: "During borehole inspection, all debris and rubble within a 0.5m radius around the borehole opening should be removed. If the borehole wall is unstable, it should be maintained." Currently, borehole protection for open-pit drilling rigs is done manually using iron tools, which clearly cannot meet the requirements of intelligent mining to achieve unmanned or minimally manned operations.

[0003] Therefore, through continuous research and experimentation by the technology team, an automatic hole protection device for perforating drills was designed. It uses a circular ring as a positioning base, and then uses a bracket to fix another circular ring on it. With the help of a dust blowing mechanism, automatic hole protection is achieved. When drilling, the dust blowing mechanism blows away the surrounding debris. When retracting the hole, the reverse rotation of the drill bit drives the upper circular ring to rotate simultaneously, thereby using centrifugal force to clean the debris on the base ring.

[0004] However, there are some shortcomings. When used on different models of drilling rigs, this device may hinder the operation of the drilling rig lifting and lowering frame on special models of drilling rigs. If it hinders the operation of the drilling rig lifting and lowering frame, this device needs to be removed before the operation of the drilling rig and then reinstalled before the drilling operation.

[0005] Therefore, the existing automatic hole protection mechanism has the problem of inconvenient installation. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic hole protection device for a drilling machine.

[0007] This utility model is implemented by the following technical solution:

[0008] An automatic hole protection device for a perforating drill includes a base, three connecting frames, and three locking cylinders. The top of the base is fixedly connected to the three connecting frames, and a locking cylinder is installed at one end of each connecting frame. The base is annular in shape, with multiple retaining rings of progressively smaller diameter inserted into the inner ring. Multiple retaining blocks are fixedly installed on the outer ring wall of each retaining ring. Multiple retaining grooves are provided at the bottom of the base and the bottom of the retaining rings. Each retaining block is inserted into and slidably connected to a corresponding retaining groove. A bolt is screwed onto each retaining block. Two mounting frames are welded to the base. A rotating ring is provided on one side of each mounting frame, and a dovetail groove is provided on one side of the rotating ring. Two dovetail blocks are slidably connected within the dovetail groove, and each dovetail block is fixedly connected to one end of a corresponding mounting frame. Two connecting frames are fixedly installed on the rotating ring. A locking block is slidably connected within the locking cylinder, and an arc-shaped clamping plate is fixedly connected to one end of each locking block. The three arc-shaped clamping plates form an annular shape, and rolling balls are embedded in the inner wall of each arc-shaped clamping plate.

[0009] Preferably, the locking block is a horizontally placed U-shaped block with several engaging teeth installed on the upper part of the inner wall of the locking block. A toothed plate is provided inside the locking cylinder, and the toothed plate is engaged with several engaging teeth. A T-shaped rod is fixedly connected to one end of the toothed plate. One end of the T-shaped rod passes through the locking cylinder and is slidably connected to it. A spring is sleeved on the T-shaped rod and is provided inside the locking cylinder.

[0010] The advantages of this utility model are: it is equipped with multiple detachable and addable retaining rings, which allows the device to be used on drilling machines with different hole diameters. Moreover, it is easy to disassemble and reassemble without affecting work efficiency. It is also equipped with a locking cylinder, which, together with the T-shaped rod, allows the arc-shaped locking block to cooperate smoothly with drilling machines with different hole diameters. In addition, it is equipped with ball bearings, which can effectively ensure rotation and avoid friction that could damage the shaft. Attached Figure Description

[0011] Figure 1 This is a first-view perspective perspective view of the structure of this utility model;

[0012] Figure 2 This is a second-view perspective perspective view of the structure of this utility model;

[0013] Figure 3 This is a structural diagram showing the connection between the locking cylinder and the locking block in this utility model.

[0014] In the diagram: 1. Base; 2. Snap ring; 3. Snap groove; 4. Snap block; 5. Connecting frame; 6. Locking cylinder; 7. Mounting frame; 8. Toothed plate; 9. T-shaped rod; 10. Spring; 11. Locking block; 12. Arc-shaped clamping plate; 13. Arc-shaped friction block; 14. Rotating ring; 15. Connecting frame; 16. Dovetail groove; 17. Dovetail block. Detailed Implementation

[0015] like Figures 1 to 3 As shown, an automatic hole protection device for a perforating drill includes a base 1, three connecting frames 5, and three locking cylinders 6. The top of the base 1 is fixedly connected to the three connecting frames 5, and a locking cylinder 6 is installed at one end of each connecting frame 5. The base 1 is annular in shape. Multiple retaining rings 2 with progressively decreasing diameters are sequentially inserted into the inner ring of the base 1. Multiple retaining blocks 4 are fixedly installed on the outer ring wall of each retaining ring 2. Multiple retaining grooves 3 are provided at the bottom of the base 1 and the bottom of the retaining rings 2. Each retaining block 4 is inserted into a corresponding retaining groove 3 and slidably connected thereto. A bolt is screwed onto each retaining block 4. Two mounting frames 7 are welded onto the base 1. A rotating ring 14 is provided on one side of each mounting frame 7, and a dovetail groove 16 is provided on one side of the rotating ring 14. Two dovetail blocks 17 are slidably connected inside the base 16, each dovetail block 17 being fixedly connected to one end of a corresponding mounting bracket 7. Two connecting brackets 15 are fixedly installed on the rotating ring 14. A locking block 11 is slidably connected inside the locking cylinder 6, and an arc-shaped clamping plate 12 is fixedly connected to one end of the locking block 11. The three arc-shaped clamping plates 12 form a ring, and rolling balls are embedded in the inner wall of each arc-shaped clamping plate 12. In use, the device is connected to the hydraulic system output end of the machine through the connecting bracket 15. When the drilling machine starts drilling, the device also falls to the ground as the drill bit descends. The base 1 is in close contact with the ground around the drilling position. The drill bit and drill rod pass through the central circular notch of the base 1, which has a large diameter. Within the diameter between the three arc-shaped clamping plates 12, during drilling, drill cuttings, under the action of the drilling rig's air pressure, fall through the central circular notch of the base 1 and fall outside the outer diameter range of the base 1. Drill cuttings falling from the area where the central circular notch of the base 1 is slightly larger than the drilling diameter will also be blown by the drilling rig's air pressure to the area between the central circular notch of the base 1 and the outer diameter of the base 1. After drilling is completed, as the drill bit is pulled out of the hole and comes into contact with the three arc-shaped friction blocks 13, because the outer diameter of the drill bit is larger than the inner diameter of the three arc-shaped clamping plates 12, the bottom end of the drill bit and the three arc-shaped friction blocks 13 are in contact. The three arc-shaped clamping plates 12 transmit the power of lifting and rotating the drill bit to the base 1 through the connecting frame 5. The rotational power of the drill bit generates centrifugal force, which pushes the central circular notch of the base 1... Drill cuttings within the outer diameter range of the base 1 are scattered to areas outside the borehole area. A connecting frame 5 is provided between the base 1 and the three arc-shaped clamping plates 12, providing a certain space for drilling and slag removal, and also serving to connect the base 1 and the three arc-shaped clamping plates 12, so that the positions of the base 1 and the three arc-shaped clamping plates 12 are relatively fixed. In order to further ensure the practicality of the device, multiple retaining rings 2 are added, which can be used for holes of different diameters, thereby making the device more widely applicable. A rotating ring 14 is also provided. When the whole device rotates, due to the dovetail groove 16 and two dovetail blocks 17, the normal operation of the hydraulic system can be ensured, and the problem of knotting due to rotation will not occur, ensuring the normal operation of the equipment.

[0016] The locking block 11 is a horizontally placed U-shaped block. Several engaging teeth are installed on the upper part of the inner wall of the locking block 11. A toothed plate 8 is provided inside the locking cylinder 6. The toothed plate 8 is engaged with the several engaging teeth. A T-shaped rod 9 is fixedly connected to one end of the toothed plate 8. One end of the T-shaped rod 9 passes through the locking cylinder 6 and is slidably connected to it. A spring 10 is sleeved on the T-shaped rod 9 and is located inside the locking cylinder 6. In order to further ensure that the disassembly and installation of the device are more convenient, during installation, two operators directly pull the T-shaped rod 9 to disengage the toothed plate 8 from the several engaging teeth. Then, the drill bit can be directly inserted into the three arc-shaped clamping plates 12. The arc-shaped clamping plates 12 are then attached to the position of the drill rod in the drill bit assembly. The T-shaped rod 9 can then be released. The ball bearings are used to reduce friction and ensure stable sliding of the drill bit, which makes disassembly and installation more convenient.

[0017] Each component is relatively simple and easy to manufacture. It can be made using simple steel and ordinary bolts, making it highly practical. Furthermore, it uses the power of the drill bit for transmission, fundamentally solving the problems of high labor intensity, low work efficiency, and substandard hole protection quality associated with traditional manual hole protection, and has the advantages of energy saving and consumption reduction.

[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic hole protection device for a perforating drill, characterized in that, The device includes a base, three connecting brackets, and three locking cylinders. The top of the base is fixedly connected to the three connecting brackets, and a locking cylinder is installed at one end of each connecting bracket. The base is annular in shape. Multiple retaining rings with progressively decreasing diameters are sequentially inserted into the inner ring of the base. Multiple retaining blocks are fixedly installed on the outer ring wall of each retaining ring. Multiple retaining grooves are provided at the bottom of the base and the bottom of the retaining rings. Each retaining block is inserted into a corresponding retaining groove and slidably connected thereto. A bolt is screwed onto each retaining block. Two mounting brackets are welded onto the base. A rotating ring is provided on one side of each mounting bracket. A dovetail groove is provided on one side of each rotating ring. Two dovetail blocks are slidably connected within the dovetail groove. Each dovetail block is fixedly connected to one end of a corresponding mounting bracket. Two connecting brackets are fixedly installed on the rotating ring. A locking block is slidably connected within the locking cylinder. An arc-shaped clamping plate is fixedly connected to one end of each locking block. The three arc-shaped clamping plates form an annular shape. Rolling balls are embedded in the inner wall of each arc-shaped clamping plate.

2. The automatic hole protection device for perforating drills according to claim 1, characterized in that: The locking block is in the shape of a horizontal U. The upper part of the inner wall of the locking block is equipped with several engaging teeth. The locking cylinder is provided with a toothed plate, which is engaged with several engaging teeth. One end of the toothed plate is fixedly connected to a T-shaped rod, and one end of the T-shaped rod passes through the locking cylinder and is slidably connected to it. A spring is sleeved on the T-shaped rod and is provided inside the locking cylinder.

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